def get_default() -> Optional[MLEnvironment]:
"""
Get the MLEnvironment use the default MLEnvironmentId.
:return: the default MLEnvironment.
"""
with MLEnvironmentFactory._lock:
if MLEnvironmentFactory._map[
MLEnvironmentFactory._default_ml_environment_id] is None:
j_ml_env = get_gateway().\
jvm.org.apache.flink.ml.common.MLEnvironmentFactory.getDefault()
ml_env = MLEnvironment(
ExecutionEnvironment(j_ml_env.getExecutionEnvironment()),
StreamExecutionEnvironment(
j_ml_env.getStreamExecutionEnvironment()),
BatchTableEnvironment(j_ml_env.getBatchTableEnvironment()),
StreamTableEnvironment(
j_ml_env.getStreamTableEnvironment()))
MLEnvironmentFactory._map[
MLEnvironmentFactory._default_ml_environment_id] = ml_env
return MLEnvironmentFactory._map[
MLEnvironmentFactory._default_ml_environment_id]
